Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ec0733b532ff6e…

MALICIOUS

PDF

85.1 KB Created: 2021-05-03 15:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 11b7f729ce25caa9571616f40c6e415c SHA-1: 723c8a81181dfa81d4f39d1209d99b5bfac97a47 SHA-256: e5ec0733b532ff6e90c6af9379551b1efcb039719cce132918ad8940fb7803f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as link farms on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to contain text related to English verbs, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=verbos+regulares+e+irregulares+en+ingles+para+ni%25C3%25B1os+de+primaria PDF link annotation
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/kuzabofoxoweweb.pdfIn PDF document text
    • http://mif-smeh.space/648316502999n7j5.pdfIn PDF document text
    • http://pro-konditer.com/bamixagutescdyy5.pdfIn PDF document text
    • http://beautysss.site/how_to_do_a_force_reset_on_iphoneek6ko.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/estomatitis_aftosa_niosxy82z.pdfIn PDF document text
    • https://pavuteji.weebly.com/uploads/1/3/4/3/134397615/24d6e7fabbd0.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/ApjcibK/jibajan.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/a1PnBlq/cake_cutter_slicer.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/9NhCjb6/luke_bryan_tour_songs_2020.pdfIn PDF document text
    • http://tiktoktop.design/49144647587acje4.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/iaiigjb/police_officer_shot_and_killed_in_chicago.pdfIn PDF document text
    • http://masajsalonunuz.com/28220576219e6uki.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/sozat.pdfIn PDF document text
    • http://idealicaufficiale.website/physiotherapists_pocket_bookjlx0v.pdfIn PDF document text
    • http://euromarket.pro/mekokukavojef2qug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cbc5ee-cc6e-4c5d-8263-b8c766f98cb3/zuxumepisinemonevekun.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_7cdf4877fd2047f194890b5a6e0f9ccc.pdf?index=trueIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_aeb9a28d9b004268b277a046bc0418ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac76417-1a30-42e2-8d6d-4eba2b0fc184/60697212879.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 5596 bytes
SHA-256: 1bc70db9529bd0c1ceff9ed69aea94040638a9002e270a46b66143036ce7bb32
font_01_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 11532 bytes
SHA-256: cda870909637b9dddb2a7116cab49c99f5f60dea6c82354a4bfae390bd3d9fc1
font_02_sfnt_off00012e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9

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